p2pool/bitcoin/stratum.py

   1 import random
   2 import sys
   3
   4 from twisted.internet import protocol, reactor
   5
   6 from p2pool.bitcoin import data as bitcoin_data, getwork
   7 from p2pool.util import expiring_dict, jsonrpc, pack
   8
   9
  10 class StratumRPCMiningProvider(object):
  11     def __init__(self, wb, other):
  12         self.wb = wb
  13         self.other = other
  14
  15         self.username = None
  16         self.handler_map = expiring_dict.ExpiringDict(300)
  17
  18         self.watch_id = self.wb.new_work_event.watch(self._send_work)
  19
  20     def rpc_subscribe(self):
  21         reactor.callLater(0, self._send_work)
  22
  23         return [
  24             ["mining.notify", "ae6812eb4cd7735a302a8a9dd95cf71f"], # subscription details
  25             "", # extranonce1
  26             self.wb.COINBASE_NONCE_LENGTH, # extranonce2_size
  27         ]
  28
  29     def rpc_authorize(self, username, password):
  30         self.username = username
  31
  32         reactor.callLater(0, self._send_work)
  33
  34     def _send_work(self):
  35         x, got_response = self.wb.get_work(*self.wb.preprocess_request('' if self.username is None else self.username))
  36         jobid = str(random.randrange(2**128))
  37         self.other.svc_mining.rpc_set_difficulty(bitcoin_data.target_to_difficulty(x['share_target'])).addErrback(lambda err: None)
  38         self.other.svc_mining.rpc_notify(
  39             jobid, # jobid
  40             getwork._swap4(pack.IntType(256).pack(x['previous_block'])).encode('hex'), # prevhash
  41             x['coinb1'].encode('hex'), # coinb1
  42             x['coinb2'].encode('hex'), # coinb2
  43             [pack.IntType(256).pack(s).encode('hex') for s in x['merkle_link']['branch']], # merkle_branch
  44             getwork._swap4(pack.IntType(32).pack(x['version'])).encode('hex'), # version
  45             getwork._swap4(pack.IntType(32).pack(x['bits'].bits)).encode('hex'), # nbits
  46             getwork._swap4(pack.IntType(32).pack(x['timestamp'])).encode('hex'), # ntime
  47             True, # clean_jobs
  48         ).addErrback(lambda err: None)
  49         self.handler_map[jobid] = x, got_response
  50
  51     def rpc_submit(self, worker_name, job_id, extranonce2, ntime, nonce):
  52         if job_id not in self.handler_map:
  53             print >>sys.stderr, '''Couldn't link returned work's job id with its handler. This should only happen if this process was recently restarted!'''
  54             return False
  55         x, got_response = self.handler_map[job_id]
  56         coinb_nonce = extranonce2.decode('hex')
  57         assert len(coinb_nonce) == self.wb.COINBASE_NONCE_LENGTH
  58         new_packed_gentx = x['coinb1'] + coinb_nonce + x['coinb2']
  59         header = dict(
  60             version=x['version'],
  61             previous_block=x['previous_block'],
  62             merkle_root=bitcoin_data.check_merkle_link(bitcoin_data.hash256(new_packed_gentx), x['merkle_link']),
  63             timestamp=pack.IntType(32).unpack(getwork._swap4(ntime.decode('hex'))),
  64             bits=x['bits'],
  65             nonce=pack.IntType(32).unpack(getwork._swap4(nonce.decode('hex'))),
  66         )
  67         return got_response(header, worker_name, coinb_nonce)
  68
  69     def close(self):
  70         self.wb.new_work_event.unwatch(self.watch_id)
  71
  72 class StratumProtocol(jsonrpc.LineBasedPeer):
  73     def connectionMade(self):
  74         self.svc_mining = StratumRPCMiningProvider(self.factory.wb, self.other)
  75
  76     def connectionLost(self, reason):
  77         self.svc_mining.close()
  78
  79 class StratumServerFactory(protocol.ServerFactory):
  80     protocol = StratumProtocol
  81
  82     def __init__(self, wb):
  83         self.wb = wb